I just received my very first alert from the corona app detecting whether I was in the vicinity of a contagious person for longer than 15 minutes. As I haven’t been in any other place for that long other than my own home, I’m 100% certain the app is telling me I have someone carrying COVID-19 in my home. The app is correct. That person is called the Man on this digital log. He’s been trying to infect me for a week now (supported by Daughter) and still unsuccessful. And indeed he was marked as Covid-19 positive by the GGD after a PCR test.